I think it speaks volumes about Americans that the two museums on this list are in 18th and 24th places. I count 13, a bit more than half. 16, the other 18, and 22 are the ones I'd be interested in seeing, and maybe 4- I'd definitely like to go back and visit some of Boston's historical sites.

Oops, followup- didn't remove SF's comment on Waikiki; I've never been anywhere close to Hawaii.